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GPS Navigation

GPS navigation, or global positioning system navigation, is a modern invention that allows the tracing or mapping of an area with the use of satellite positioning. This system was developed by Ian Getting and the United States Department of Defense, for military use in navigation and surveillance. Early GPS navigation was done with the use of eighteen satellites in constant communication with ground stations. Since 2007, there have been twenty-four GPS satellites in orbit, forming what is known as the "satellite constellation."

This continuous communication between satellites and ground stations is done through signals that contain information such as time, satellite orbit position, and receiver position. All of the information that is communicated in GPS is interpreted by the receiver to map out a location, path, or to locate an object. GPS navigation has evolved into a highly accurate system that is used by both the military and civilians. Initially, signals sent between the station and the satellite allowed for GPS navigation to be accurate up to a few meters. Today, more advanced systems can pinpoint destinations, routes, or objects with an accuracy of up to a few centimeters.

There are numerous uses for GPS navigation. Some of the common military uses of GPS navigation includes missile guiding systems, surveillance missions, or guiding troops through unfamiliar terrain. Civilian uses for GPS navigation involve receiving direction to a destination and mail or order tracking. GPS navigation availability is constantly increasing as the system is becoming a norm for automobiles and mobile phones.

GPS Navigation Articles

Desert's mystery: ancient 'Western' boat people

IN THE middle of a terrifying desert north of Tibet, Chinese archaeologists have excavated an extraordinary cemetery. Its inhabitants died almost 4000 years ago, yet their bodies have been preserved by the dry air.

Beware the evils of the inbox

Technology has shrunk the world but, according to one sceptic, the social and literary costs are high.

Gadgets

The iPhone 3GS must be about the sexiest gift you could find in a stocking. With that lovely touch-screen interface and enough smarts to make you forget to use it as a phone, Santa is going to have trouble letting go. Store your entire music collection, download whole films..read more

Supermarket ad trials: your shopping trolley knows what you want

ADS delivered to supermarket trolleys based on a shopper's in-store behaviour and purchasing history are set to go live within the next six months – a move that could quite literally take the thinking out of shopping.

It's a motorpsycho nightmare, but don't think twice, it's all right

THEY'RE selling postcards of the hanging . . .
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